Flurbiprofen ((1S,9S,10S)-4-methoxy-17-methyl-17-azatetracyclo[7.5.3.01,10.02,7]heptadeca-2(7),3,5-triene)
Flurbiprofen EP Impurity B (2-(2-fluorobiphenyl-4-yl)-2,3-dimethylbutanedioic acid)